Intangible Assets

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

Intangible assets consist of the following:

	December 31,
	2021		2020
Research licenses and computer software	$	16,430	$	16,390
Software implementation costs	$	1,289	$	—
Less accumulated amortization	(13,881)		(11,087)
Intangible assets, net	$	3,838	$	5,303

Amortization expense on intangible assets for the years ended December 31, 2021, 2020 and 2019 was $2,793, $4,160 and $3,113, respectively.

At December 31, 2021, amortization expense on intangible assets is estimated to be as follows for each of the next five years:

	Amortization expense
2022	$	597
2023	$	452
2024	$	432
2025	$	427
2026	$	427
	$	2,335